Are you sure PDFReader is done processing it. Sounds to me like possibly to file was still being written to.. when you try to copy it to your Kindle.
Also, sounds like you are doing a "move" and not a copy.
You should be able to copy any file to your Kindle. It is just a storage device as far as your PC is concerned. Heck, you could copy a .doc or an .xls to it and that will happen fine. Of course, the kindle can read/display either of those file types.
BOb
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